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7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Sullivan, OH
Content continues below
May
Average Temperature
High
22°
Feels 22
Low
10°
Feels 9
Average Precipitation
11 Days
Rain amount
79.8mm
Snow amount
0cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15°
15
20°
16
24°
17
26°
18
30°
19
27°
20
23°
21
18°
22
17°
23
20°
24
21°
25
22°
26
23°
27
23°
28
24°
29
30
31
Forecast
Thursday, May 14, 2026
Day
15°
Feels 13
Wind
28 km/h NW
Gust
42 km/h
Humidity
46%
P.O.P
40%
Rain
<1 mm
Night
5°
Feels 3
Wind
18 km/h W
Gust
32 km/h
Humidity
75%
P.O.P
10%
Historical Averages
May 14
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.